/*
 * Copyright 2021 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SKSL_CHILDCALL
#define SKSL_CHILDCALL

#include "src/sksl/SkSLDefines.h"
#include "src/sksl/SkSLPosition.h"
#include "src/sksl/ir/SkSLExpression.h"
#include "src/sksl/ir/SkSLIRNode.h"

#include <cstdint>
#include <memory>
#include <string>
#include <utility>

namespace SkSL {
class Context;
class Type;
class Variable;
enum class OperatorPrecedence : uint8_t;

/* *
 * A call to a child effect object (shader, color filter, or blender).
 */
class ChildCall final : public Expression {
public:
    inline static constexpr Kind kIRNodeKind = Kind::kChildCall;

    ChildCall(Position pos, const Type *type, const Variable *child, ExpressionArray arguments)
        : INHERITED(pos, kIRNodeKind, type), fChild(*child), fArguments(std::move(arguments))
    {}

    // Creates the child call; reports errors via ASSERT.
    static std::unique_ptr<Expression> Make(const Context &context, Position pos, const Type *returnType,
        const Variable &child, ExpressionArray arguments);

    const Variable &child() const
    {
        return fChild;
    }

    ExpressionArray &arguments()
    {
        return fArguments;
    }

    const ExpressionArray &arguments() const
    {
        return fArguments;
    }

    std::unique_ptr<Expression> clone(Position pos) const override;

    std::string description(OperatorPrecedence) const override;

private:
    const Variable &fChild;
    ExpressionArray fArguments;

    using INHERITED = Expression;
};
} // namespace SkSL

#endif
